Air-lift pumping mechanism



H. B. HALVORSEN.

AIR LIFT PUMPING MECHANISM.

APPLICATION .flLED ,'uLY 23, |920.

Patented Aug. 22, 1922.

and useful llmprovements nutren staresy ortica.

EIAIQBERT 3B.4 HALVORSEN, @F CHCAGU, I'LENOS, ASSGNOR T@ SLLIVAN I MGHENERY COMPANSfA (GRPURATKON @E MASSCHUSETYTS. i

.ern-nier rosarino rrnonanrsar. I

specification of retournent. @mamma Aug, 22, 11922,

implication filed July 23, 3.92@ Serial No. 39%662 To all whom it :may con/cern:

Be it lmown that ll, listener B. HALvoR- smv, a citizen of the United States, residing at Chicago, in the county oii Cook. and State oi illinois, have invented certain new in Air-Lift Pumping Mechanisms, ot' which the ollowv in is a ull, clear,` and enact specification.

"y invention relates to air lift ,piunping mechanisms and more particularly `to foot pieces for such mechanisms.

in object oi inP invention is to provide an improved'air itt pumping mechanism. Another object ot my invention is toprovide an improved foot piece for air litt pumping' mechanisms. A further object of my inventionis to provide an improved foot piece for air lift pumping mechanisms in which by reason of the disposition of the air discharge ports, a thorough emulsiication of the water and air may be secured. @ther objects of my invention will appear during the course of the appended speciiication and claims. l ln the accompanying` drawings, l have shown for purposes of illustration, one form which my invention may assume in practice.

Fig. 1 is a developed section through my improved toot piece on line 1-1 of Fig. El.

Fig. 2 is a transverse section on the line Q 2 of Figi 1.

llt has been found that in foot pieces ot' relatively large diameter, thickness of the stream of water prevents to a certain degree the air escaping through the perforations in a central mixing tube from making a. complete and perfect mixture. lu order to overcome this difficulty, an outer mixing tube may be employed as will hereinafter be described to augment the working of the central tube, thus forcing the air into the stream of water passed through the pump chamber from the center and from its periphery, and in this way securing` a perfect emulsion of the water and air.

lvly improved toot piece, which constitutes an improvement over that disclosed in my copending application, Serial No. 298,466, filed May 20, 1919, comprises an outer casing member 1 which is provided with a connection as shown at 2 for the downwardly extendingy air supply pipe. This connection opens into lateral chamber 3 which communicates with an annular chamber l formed between the outer casing member 1 and an inner annular casing member 5. The air chamber d to which downwardly owing air is admitted Serves as a reservoir from which air is discharged by the paslow, as indicated at 11, and which at a point acent its center is expanded as at 12 to provide a soclret for the reception ot a mixing tube 13. This mining tube is ci the general shape or" two cones placed base to base and from its lower end expands in diameter ifor a short distance, as indicated at 1d. From its point of maximum diameter it tapers gradually to its point of attachment 15 to the socket 12. The lower end oi the mixing tube 13 is closed by means of a suitable plug as indicated at 16, this plug being preferably conical in form. By reason of the double conical shape of the miningl tube 13, the water passing through the riser pipe is smoothly separated into an. annular ascending,I column and to permit.

its passage beyond the opposite end of the central mixing tube in as uninterrupted and undisturbed a manner as possible, a conical cap is located at the upper end of the mixing tube, this cap being designated as 17. The passages 11, will be noted, serve to conduct the air brought into member 3 to the interior or the central mixing tube 13 and this air is discharged by way of passages 18 in generally outward radial di= rections in such manner as to thoroughly aerate and cmulsi'fy the water passing between the concentrically arranged mixing tubes.

lt will. be noted that at the lower end of the chamber 4 l have provided a vent 19 which constitutes a sand outlet, the `lunction of this vent being; to permit the escape osand which might get into the chamber l especially duringf the period immediately 'following the turning oit" oi the air to pump. Y

While l have in this application speciically described one term which my other forms without departing from itsv l spirit or the scope of the appended claims.

What l claim as new-and desire to secure by Letters Patent is:

1. ln an air lift pump, a foot piece comprising means for dividing the ascending column of liquid into an unbroken annulus,

and means for simultaneously aerating said annulus from both sides thereof as it is formed and while it is still unbroken.

2. ln an air lift pump, a foot piece comprising acasing member, an inwardly extending support member at the u per end thereof, and means depending t' erefrom for dividing the ascending column of liquid intoan unbroken annulus and aerating the same.

' 3. in an air lift pump, a foot piece comprising a casing member, a diametrically ex-l tendin support member at the upper end thereof, a mixing tube depending therefrom and dividing the ascending column of liquid into an unbrokenv annulus, and means for supplying aerating fluid to said mixing tube throu h said support member. v

Y Il. n an air lift pump, a foot piece comprising an external casing member and an internal casing member forming an annular chambera transversely extending connection between the opposite sides of said annular chamber adjacent the upper end thereof, a mixing tube depending from said transverse member, and means for supplying aerating fluid from said annular chamber and from said mixing tube to the ascendingl column yof li uid.

5. lln an air li t pump, a foot piece comprising lconcentrically 'disposed members forming an annular chamber between them anda cylindrical vchamberwithin the inner one thereoaA supportimember extending transversely across said cylindrical chamber and arranged at the u vper end thereof, an aeratin tube coaxial y disposed with respect to sai c lindrical chamber and supported by sai ltransverse member, and means for sup lying aerating fiuid to the column of liqui passing between said aerating tube and the inner one of said first mentioned members simultaneously from opposite sides.

6. ln an air lift pump, a foot piece com-l rising Iconce'ntrcally disposed members orming an annular chamben between them anda `cylindrical chamber wlthin the inner one thereof, a support member extendin transversely across Athe upperend of sai cylindrical' chamber, a mixing tube coaxiall disposed vwith respectl to said cylindi'cal chamber and supportedby said support member, and means for supplying aerating fluid to the column of duid passing and a cylindrical chamber within the inner one thereof, a support member extending transversely across the upper end of said cylindrical chamber, a mixing tube coaxially vdisposed with respect to said 'cylindrical chamber and supported by said support member, and means for supplying aerating fluid /to the column of fluid passing between said mixing tube and the inner one of said first mentioned members simultaneously from opposite sides, said mixing tube having a conical point at its lower extremity, and tapering from a point a short distance above its lower extremity toward its upper end.

8. ln an air lift pump, a foot piece comprising concentrically disposed members forming an annular chamber between them and a cylindrical chamber within the inner one thereof, a transverse support member` extending transversely of said cylindrical chamber and arranged at the upper-end thereof, a mixing tube vcoaxially disposed with respect to said cylindrical chamber and supported by saidv transverse member, and' means for supplying aerating fluid to the column of fluid passing betweensaid mix- Q ing tube and 'the inner one of said first mentioned members simultaneously from opposite sides, said mixing tube having a conical point at its lower extremity, and tapering from a point a short distance above its lower extremity toward its' upperV end, and being provided beyond its upper extremitylwith a conicalv cap.'l

9. 'ln an air lift pump', afoot piece com'- prising -concentrically disposed members forming an annular chamber between them and a cylindrical chamber within the inner one thereof, a transverse support member extending transversely of said cylindrical chamber and arranged at -the upper end thereof, a mixing tubecoaxially disposed with'respect to said cylindrical chamber'and 4supported'by said transverse member, and

means for supplying aerating fluid to they column of fluid .passing between saidmix-l ing tube and the inner one `of said rst mentioned' members simultaneously lfrom opposite sides, said mixing tube having a conical point at its lower extremity and tapering from a point a short distanceA above its lower extremity toward its upper end,

`and being provided at its upper extremity with a conical cap, and said external cham.-

ber memberbeing-provided with a venturi throat ata/ point above said mixing tube.'

l0. ln an air lift pump, a foot piece comprising an annular air chamber, upwardly directed passages for discharging air therefrom to the liquid to be pumped, and means arranged at the bottom of said air chamber and permitting the escape therefrom of such. solidmatter as may obtain entrance to said air chamber through said upwardly directed passages, said means during` pumping operation of said foot piece operating --as an aerating means discharging to the upwardly moving column of liquid.

ll. ln an air lift pump, a foot pieee oomprising means for dividing the ascending column of liquid into an unbroken annulus, means for supporting said annulus torming means disposed at the upper end thereof? and means for simultaneously aerating said annulus from both sides thereof arranged below said supporting means and including jet forming means formed in said lirst mentioned means.

in testimony whereof l aix my signature. Y

i Hamam e. nanyoasmi, 

